Biomaterial Database

Effect of delta9-tetrahydrocannabinol on mitochondrial NADH-oxidase activity. 1976

A Bartova, and M K Birmingham

Delta9-Tetrahydrocannabinol (delta9-THC), the active ingredient of marihuana was found to be a highly effective inhibitor in vitro of the NADH-oxidase activity of rat brain and heart mitochondria. The degree of inhibition of the enzyme system obtained from rat brain tissue varied with the region from which it was derived as follows, in the presence of 10(-5) M delta9-THC: hypothalamus plus thalamus plus midbrain, 73 +/- 4%; cerebellum, 66 +/- 4%; medulla oblongata plus pons, 63 +/- 6%; cerebral cortex, 50 +/- 8%. The same concentration inhibited rat heart NADH-oxidase activity 69 +/- 9%. Inhibition of NADH-oxidase activity by a corresponding concentration of deoxycorticosterone was significantly less in all tissue preparations tested, ranging from 11% to 26%. The inhibition of delta9-THC appeared to be competitive and near the amytal-sensitive site of the electron transport system. Suggestive evidence was also obtained for a second site of action, above the cytochrome c site.

UI	MeSH Term	Description	Entries
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D008928	Mitochondria	Semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. Each mitochondrion is surrounded by a double limiting membrane. The inner membrane is highly invaginated, and its projections are called cristae. Mitochondria are the sites of the reactions of oxidative phosphorylation, which result in the formation of ATP. They contain distinctive RIBOSOMES, transfer RNAs (RNA, TRANSFER); AMINO ACYL T RNA SYNTHETASES; and elongation and termination factors. Mitochondria depend upon genes within the nucleus of the cells in which they reside for many essential messenger RNAs (RNA, MESSENGER). Mitochondria are believed to have arisen from aerobic bacteria that established a symbiotic relationship with primitive protoeukaryotes. (King & Stansfield, A Dictionary of Genetics, 4th ed)	Mitochondrial Contraction,Mitochondrion,Contraction, Mitochondrial,Contractions, Mitochondrial,Mitochondrial Contractions
D008931	Mitochondria, Muscle	Mitochondria of skeletal and smooth muscle. It does not include myocardial mitochondria for which MITOCHONDRIA, HEART is available.	Sarcosomes,Mitochondrion, Muscle,Muscle Mitochondria,Muscle Mitochondrion,Sarcosome
D009206	Myocardium	The muscle tissue of the HEART. It is composed of striated, involuntary muscle cells (MYOCYTES, CARDIAC) connected to form the contractile pump to generate blood flow.	Muscle, Cardiac,Muscle, Heart,Cardiac Muscle,Myocardia,Cardiac Muscles,Heart Muscle,Heart Muscles,Muscles, Cardiac,Muscles, Heart
D009247	NADH, NADPH Oxidoreductases	A group of oxidoreductases that act on NADH or NADPH. In general, enzymes using NADH or NADPH to reduce a substrate are classified according to the reverse reaction, in which NAD+ or NADP+ is formally regarded as an acceptor. This subclass includes only those enzymes in which some other redox carrier is the acceptor. (Enzyme Nomenclature, 1992, p100) EC 1.6.	Oxidoreductases, NADH, NADPH,NADPH Oxidoreductases NADH,Oxidoreductases NADH, NADPH
D001921	Brain	The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.	Encephalon
D002188	Cannabis	The plant genus in the Cannabaceae plant family, Urticales order, Hamamelidae subclass. The flowering tops are called many slang terms including pot, marijuana, hashish, bhang, and ganja. The stem is an important source of hemp fiber.	Bhang,Ganja,Hashish,Hemp,Cannabis indica,Cannabis sativa,Hemp Plant,Marihuana,Marijuana,Bhangs,Cannabi,Ganjas,Hashishs,Hemp Plants,Hemps,Plant, Hemp,Plants, Hemp
D003900	Desoxycorticosterone	A steroid metabolite that is the 11-deoxy derivative of CORTICOSTERONE and the 21-hydroxy derivative of PROGESTERONE	21-Hydroxyprogesterone,Cortexone,Deoxycorticosterone,Desoxycortone,11-Decorticosterone,21-Hydroxy-4-pregnene-3,20-dione,11 Decorticosterone,21 Hydroxy 4 pregnene 3,20 dione,21 Hydroxyprogesterone
D005292	Ferricyanides	Inorganic salts of the hypothetical acid, H3Fe(CN)6.
D000654	Amobarbital	A barbiturate with hypnotic and sedative properties (but not antianxiety). Adverse effects are mainly a consequence of dose-related CNS depression and the risk of dependence with continued use is high. (From Martindale, The Extra Pharmacopoeia, 30th ed, p565)	Amylobarbitone,Pentymal,Amobarbital Sodium,Amsal,Amylbarb sodium,Amylobeta,Amytal,Amytal Sodium,Barbamyl,Eunoctal,Isoamitil Sedante,Isonal,Neur-Amyl,Novamobarb,Placidel,Sodium Amobarbital,Sodium Amytal,Transital,Amobarbital, Sodium,Sodium, Amobarbital